
Researchers from ETH Zurich have discovered critical security vulnerabilities in several widely used end-to-end encrypted (E2EE) cloud storage services, highlighting significant risks to file confidentiality, data integrity, and overall security. The study evaluated five E2EE cloud storage providers—Sync, pCloud, Seafile, Icedrive, and Tresorit—serving about 22 million users globally, and found that four out of these five services exhibited severe flaws










